Perhaps you should try some spelling variations:
"smart skills surveys." » "smart skills survey.", "soft skills surveys.", "what skills surveys."
"Smart social surveys." » "Smart topical surveys."
"Smart soil surveys." » "Smart school surveys.", "Smart point surveys.", "Smart site surveys."
smart social » small social, art social, sport social
smart soil » smart school

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("smart skills surveys.") OR ((("Smart soil surveys.") OR ("Smart social surveys."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"smart skills surveys.\") or (((\"Smart soil surveys.\") OR (\"Smart social surveys.\"))))~".
• Removing quotes may allow a broader search: (( smart skills surveys. ) or ((( Smart soil surveys. ) OR ( Smart social surveys. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("smart skills surveys.") or ((("Smart soil surveys.") OR ("Smart social surveys."))))*.